science fact and with good reason. japanese society is aging faster than any in the world. nursing facilities are stretched past capacity. against this backdrop, researchers are building new and humane intelligent machines. >> reporter: a new game is being played at this hold people's home south of tokyo. ♪ >> reporter: the residents move their bodies on cue from a robot. the exercise helps the brain and fights aging. people from the nursing industry interested in the robot came along to watch. >> translator: coming here today and seeing people talking and dancing with them made me realize that robots have become something very commonplace to old people, too. >> reporter: many of the nursing care robots are japanese inventions. they're catching the eye of facilities overseas. in some countries, they recognize the medical equipment. ironically, care giving robots have been slow to catch on in japan. people still expect the functions of caring to be given only by humans. but the situation may be changing. i'm visiting